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| Measuring Distortions with the Scope:What you see is not what you really have.. |
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| Roger Need:
Attached is a pdf document which compares the SDG1000x to SDG2000x. One feature I like in the 2000x is that you can trim the internal 10 MHz. reference from the service menu using a software DAC control. This gives much better synthesizer output frequency accuracy. Roger |
| tautech:
--- Quote from: Martin72 on December 24, 2022, 01:50:24 pm ---unfortunately the top of the tables are "cutting off" by the screenshot.. --- End quote --- Save/Recall/Save PNG/Keep menus visible. ;) |
| electr_peter:
--- Quote from: tautech on December 23, 2022, 10:58:24 pm --- --- Quote from: electr_peter on December 23, 2022, 09:55:03 pm ---2) Try looking at jitter of CH1/CH2 vs SYNC. I think SDG2000X does not have jitter, but that would be interesting to know for sure. --- End quote --- Are datasheets too hard to read ? :-// (Square wave) Jitter (rms), Cycle to cycle ... --- End quote --- There is no harm in testing, isn't it? SDG1000X shows some significant cycle to cycle jitter on page 13 in PDF comparison linked above. Devil is in the details, AWGs have many modes, so testing helps to clarify things. Cycle to cycle refers to CH1/CH2 output. Is it the same spec for SYNC? |
| 2N3055:
--- Quote from: electr_peter on December 24, 2022, 07:30:24 pm --- --- Quote from: tautech on December 23, 2022, 10:58:24 pm --- --- Quote from: electr_peter on December 23, 2022, 09:55:03 pm ---2) Try looking at jitter of CH1/CH2 vs SYNC. I think SDG2000X does not have jitter, but that would be interesting to know for sure. --- End quote --- Are datasheets too hard to read ? :-// (Square wave) Jitter (rms), Cycle to cycle ... --- End quote --- There is no harm in testing, isn't it? SDG1000X shows some significant cycle to cycle jitter on page 13 in PDF comparison linked above. Devil is in the details, AWGs have many modes, so testing helps to clarify things. Cycle to cycle refers to CH1/CH2 output. Is it the same spec for SYNC? --- End quote --- Acronym of the day here is NCO.. Inherent in their operating principle is fractional relation between generated frequency and clock. At certain frequencies CH1/CH2 will have 0 phase jitter to SYNC. On other frequencies it will have rounding errors in phase comparison. There is also a fact that at certain settings, a slight phase dithering will produce cleaner spectrum of the output signal (instead of few large peaks, harmonics gets dithered into wideband noise and into noise floor). AWGs are great because they are universal. That comes with certain tradeoffs. They will not have same pulse specifications as specialized pulse generators, but will be good enough for many uses. They will not have distortion as low as audio analyser but will have very low one, better than many old "legendary" audio sources (my SDG6000X has 0.02% THD at 1kHZ, -10dBm. SDG2000X is actually slightly better because of smaller BW. Those are very respectable numbers), SDG6000X has CCJ of 2.9ps (that's picoseconds) at 10MHz.. That includes built in TCXO and NCO engine. These are absolutely fantastic numbers for a simple AWG. |
| mawyatt:
@ 2N3055 And why we have (2000 & 6000) and use them, they are that good :-+ People bitch and complain about the UI (granted it's poor), but the "end product justifies the means" ;) Best & Happy Holidays |
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